Double-acting water pump



April 21, 1931. J s n- 1,802,070

DOUBLE ACTING WATER PUMP Filed April 25. 1930 2 Sheets-Sheet 1 Inventor wdaih A Ilorney April 21, 1931; I J sM 1,802,07Q

DOUBLE ACTING WATER PUMP Filed April 25,1930 2 Sheets-Sheet 2 1d 3 m 30 E 4 Invenlor A homey Patented Apr. 21, 1931 UNITED STATES PATENT OFFICE.

JOHN 3'. SMITH, OF HOUSTON, PENNSYLVANIA DOUBLE-ACTING VIATER PUT/LP I Application filed April 25,

that is strong, compact and durable, thor-v oughly reliable for its intended purpose, very simple in its method of assembly, and comaratively inexpensive to manufacture.

With the foregoing and other objects in view, the invention consists of a novel construction, combination and arrangement of parts, as will be hereinafter more specifically described and illustrated in the accompanying drawings, wherein is disclosed an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to without departing from the spirit of the claims hereto appended.

In the drawings wherein like reference characters denote corresponding parts through the several views Figure 1 is a longitudinal horizontal detailed section through the pump,

Fig. 2 is a detailed transverse vertical section, taken substantially on the line 2-2 of Fig. l, and I Fig. 3 is a transverse vertical section taken substantially on the line 3-3 of Fig. 1.

In the drawings ,wherein for the purpose of illustration is shown the preferred. em-

lo'od'iment of my invention, 4- is the base bar pedestal upon which rests the horizontal disposed pump cylinder,indicated generally at 5. The side walls 6 of the cylinder are formed with elongated cells 7 co-extensive with the length thereof which forms the water jacket for cooling the cylinder wall.

Secured by means of bolts 8 to one end of the cylinder, is the cylinder head 9 having central opening 10 through which extends the piston shaft 11. The outer portion of the opening 10 has a gland packing nut 12 therein, to provide a water-tight bearing for the piston rods 11.

The outer free end of the piston rod 11 is 1930. Serial No. 447,284.

connected to any suitable power means, not shown, for the purpose of imparting reciprocating motion thereto.

The cylinder 5 has a pair of diametrically opposed tubular extensions 13, 1-1, formed integral with the side wall 6 of the cylinder. The extensions are disposed in a horizontal plane and the passages 15, 16 therein communicate with the core 17 of the cylinder .at

one end thereof. Connected to the outer pipe line, the suction pipe line 18 being connected to the check valve B, while the dis charge pipe line 19, is connected to the checlr valve E.

On the forward end of the cylinder 5 is bolted as at 20, the companion cylinder head 21, leading from the center of which is the stem portion 22 of the T-shaped fitting indicated generally at 23. This fitting 23 is preferably formed integral with the cylinder head 21 and has the opposed branches 24, 25 thereof, disposed horizontally.

Through the stem 22 is the passage 26, which communicates with the passage 27 of the branches on its outer end and registers with theforward end of the bore 17 at its inner end. Extending horizontally across the front of the cylinder 5 is a bypass pipe line 28 which is connected at its opposite ends to the suction line 18 and the discharge line 19.'

The check valves C and D are interposed in theby-pass'line 28, one on each side of the fitting 23; The check valves are connected to and in communication with the Y branches of the fitting 23, the check valve C being connected at one end to the branch 24, and the by-pass conductor 28, while the other check valve D being connected at one end to the branch 25 and at the other end to the by-pass pipe line 28, so that there will be a continuous passage on the suction pipe line 18 to the discharge pipe line 19 which is controlled by the check valve C and D and this by-pass pipe line 28 also being in communication through passage 26 with the forward end of the bore 17 of the cylinder.

()n the inner end of the reciprocating connecting rod 11 is the piston 29 which moves backward and forward. The piston 29 divides the bore 17 of the cylinder into expansible chambers F forwardly and G rean wardly. The passage 26 communicating with the expansible chamber F while the passages 15, 16 lead into the expansible chamber Gr.

Each one of the check valves is formed in the same manner and it is believed that a description of the one will clearly teach the operation of the other. The check valves are formed of a cylindrical body 30 having a removable cap 31 threaded through the wall thereof which pcrn'iits entrance to the interior of the valve. The body 50 is formed with a passage 32 therethrough across which is disposed the butterfly disk valve 33 which rocks on a horizontal pivot 3-1 which is disposed across the passage 32.

It will thus be seen that the valves 33 move upwardly to open position and are closed when in horizontal position.

It therefore follows that the suction pipe line 18 being disposed horizontally on one side of the cylinder and the discharge pipe line 19 being disposed horizontally on the opposite side of the cylinder, that when piston 29 moves toward the left valves B and D are in the closed position by sucking water into expansible chamber F through the check valve C and discharging expansible chambers G into the discharge line 19 through the check valves E.

On the right hand stroke of piston 29, the check valves B and D open and the check valves E and C are closed, whereby expansible chamber G is filled with water and expansible chamber F is discharged.

The present embodiment of the invention has been disclosed in considerable detail merely for the purpose of exemplification, since in actual practice, it attains the features of advantage enumerated as desirable in the statement of the invention and the above description.

It is to be understood that by describing in detail herein any particular form, structure, or arrangement, it is not intended to limit the invention beyond the terms of the several claims, or the requirements of the prior art.

Having thus described my invention, what I claim as new is A pump of the character described comprising a cylinder, closures removably secured on the ends of the cylinder, a rod slidable through one of the closures, a piston fixed on the rod for reciprocation in the cylinder, a T coupling formed integrally on the other closure in communication with the cylinder on oneside of the piston, said cylinder JOHN J. SMITH. 

